| // gdisk.cc |
| // Program modelled after Linux fdisk, but it manipulates GPT partitions |
| // rather than MBR partitions. |
| // |
| // by Rod Smith, project began February 2009 |
| |
| /* This program is copyright (c) 2009 by Roderick W. Smith. It is distributed |
| under the terms of the GNU GPL version 2, as detailed in the COPYING file. */ |
| |
| //#include <iostream> |
| #include <stdio.h> |
| #include <string.h> |
| #include <getopt.h> |
| #include "mbr.h" |
| #include "gpt.h" |
| #include "support.h" |
| |
| // Function prototypes.... |
| // int ReadPartitions(char* filename, struct GPTData* theGPT); |
| void MainMenu(char* filename, struct GPTData* theGPT); |
| void ShowCommands(void); |
| void ExpertsMenu(char* filename, struct GPTData* theGPT); |
| void ShowExpertCommands(void); |
| void RecoveryMenu(char* filename, struct GPTData* theGPT); |
| void ShowRecoveryCommands(void); |
| |
| int main(int argc, char* argv[]) { |
| GPTData theGPT; |
| int doMore = 1; |
| char* device = NULL; |
| |
| printf("GPT fdisk (gdisk) version 0.5.3\n\n"); |
| |
| if (argc == 2) { // basic usage |
| if (SizesOK()) { |
| doMore = theGPT.LoadPartitions(argv[1]); |
| if (doMore) { |
| MainMenu(argv[1], &theGPT); |
| } // if (doMore) |
| } // if (SizesOK()) |
| } else if (argc == 3) { // usage with "-l" option |
| if (SizesOK()) { |
| if (strcmp(argv[1], "-l") == 0) { |
| device = argv[2]; |
| } else if (strcmp(argv[2], "-l") == 0) { |
| device = argv[1]; |
| } else { // 3 arguments, but none is "-l" |
| fprintf(stderr, "Usage: %s [-l] device_file\n", argv[0]); |
| } // if/elseif/else |
| if (device != NULL) { |
| theGPT.JustLooking(); |
| doMore = theGPT.LoadPartitions(device); |
| if (doMore) theGPT.DisplayGPTData(); |
| } // if |
| } // if |
| } else { |
| fprintf(stderr, "Usage: %s [-l] device_file\n", argv[0]); |
| } // if/else |
| } // main |
| |
| // Accept a command and execute it. Returns only when the user |
| // wants to exit (such as after a 'w' or 'q' command). |
| void MainMenu(char* filename, struct GPTData* theGPT) { |
| char command, line[255], buFile[255]; |
| char* junk; |
| int goOn = 1; |
| PartTypes typeHelper; |
| uint32_t temp1, temp2; |
| |
| do { |
| printf("\nCommand (? for help): "); |
| junk = fgets(line, 255, stdin); |
| sscanf(line, "%c", &command); |
| switch (command) { |
| case 'b': case 'B': |
| printf("Enter backup filename to save: "); |
| junk = fgets(line, 255, stdin); |
| sscanf(line, "%s", (char*) &buFile); |
| theGPT->SaveGPTBackup(buFile); |
| break; |
| case 'c': case 'C': |
| if (theGPT->GetPartRange(&temp1, &temp2) > 0) |
| theGPT->SetName(theGPT->GetPartNum()); |
| else |
| printf("No partitions\n"); |
| break; |
| case 'd': case 'D': |
| theGPT->DeletePartition(); |
| break; |
| case 'i': case 'I': |
| theGPT->ShowDetails(); |
| break; |
| case 'l': case 'L': |
| typeHelper.ShowTypes(); |
| break; |
| case 'n': case 'N': |
| theGPT->CreatePartition(); |
| break; |
| case 'o': case 'O': |
| printf("This option deletes all partitions and creates a new " |
| "protective MBR.\nProceed? "); |
| if (GetYN() == 'Y') { |
| theGPT->ClearGPTData(); |
| theGPT->MakeProtectiveMBR(); |
| } // if |
| break; |
| case 'p': case 'P': |
| theGPT->DisplayGPTData(); |
| break; |
| case 'q': case 'Q': |
| goOn = 0; |
| break; |
| case 'r': case 'R': |
| RecoveryMenu(filename, theGPT); |
| goOn = 0; |
| break; |
| case 's': case 'S': |
| theGPT->SortGPT(); |
| printf("You may need to edit /etc/fstab and/or your boot loader configuration!\n"); |
| break; |
| case 't': case 'T': |
| theGPT->ChangePartType(); |
| break; |
| case 'v': case 'V': |
| if (theGPT->Verify() > 0) { // problems found |
| printf("You may be able to correct the problems by using options on the experts\n" |
| "menu (press 'x' at the command prompt). Good luck!\n"); |
| } // if |
| break; |
| case 'w': case 'W': |
| if (theGPT->SaveGPTData() == 1) |
| goOn = 0; |
| break; |
| case 'x': case 'X': |
| ExpertsMenu(filename, theGPT); |
| goOn = 0; |
| break; |
| default: |
| ShowCommands(); |
| break; |
| } // switch |
| } while (goOn); |
| } // MainMenu() |
| |
| void ShowCommands(void) { |
| printf("b\tback up GPT data to a file\n"); |
| printf("c\tchange a partition's name\n"); |
| printf("d\tdelete a partition\n"); |
| printf("i\tshow detailed information on a partition\n"); |
| printf("l\tlist known partition types\n"); |
| printf("n\tadd a new partition\n"); |
| printf("o\tcreate a new empty GUID partition table (GPT)\n"); |
| printf("p\tprint the partition table\n"); |
| printf("q\tquit without saving changes\n"); |
| printf("r\trecovery and transformation options (experts only)\n"); |
| printf("s\tsort partitions\n"); |
| printf("t\tchange a partition's type code\n"); |
| printf("v\tverify disk\n"); |
| printf("w\twrite table to disk and exit\n"); |
| printf("x\textra functionality (experts only)\n"); |
| printf("?\tprint this menu\n"); |
| } // ShowCommands() |
| |
| // Accept a recovery & transformation menu command. Returns only when the user |
| // issues an exit command, such as 'w' or 'q'. |
| void RecoveryMenu(char* filename, struct GPTData* theGPT) { |
| char command, line[255], buFile[255]; |
| char* junk; |
| PartTypes typeHelper; |
| uint32_t temp1; |
| int goOn = 1; |
| |
| do { |
| printf("\nrecovery/transformation command (? for help): "); |
| junk = fgets(line, 255, stdin); |
| sscanf(line, "%c", &command); |
| switch (command) { |
| case 'b': case 'B': |
| theGPT->RebuildMainHeader(); |
| break; |
| case 'c': case 'C': |
| printf("Warning! This will probably do weird things if you've converted an MBR to\n" |
| "GPT form and haven't yet saved the GPT! Proceed? "); |
| if (GetYN() == 'Y') |
| theGPT->LoadSecondTableAsMain(); |
| break; |
| case 'd': case 'D': |
| theGPT->RebuildSecondHeader(); |
| break; |
| case 'e': case 'E': |
| printf("Warning! This will probably do weird things if you've converted an MBR to\n" |
| "GPT form and haven't yet saved the GPT! Proceed? "); |
| if (GetYN() == 'Y') |
| theGPT->LoadMainTable(); |
| break; |
| case 'f': case 'F': |
| printf("Warning! This will destroy the currently defined partitions! Proceed? "); |
| if (GetYN() == 'Y') { |
| if (theGPT->LoadMBR(filename) == 1) { // successful load |
| theGPT->XFormPartitions(); |
| } else { |
| printf("Problem loading MBR! GPT is untouched; regenerating protective MBR!\n"); |
| theGPT->MakeProtectiveMBR(); |
| } // if/else |
| } // if |
| break; |
| case 'g': case 'G': |
| temp1 = theGPT->XFormToMBR(); |
| if (temp1 > 0) { |
| printf("Converted %d partitions. Finalize and exit? ", temp1); |
| if (GetYN() == 'Y') { |
| if (theGPT->DestroyGPT(0) > 0) |
| goOn = 0; |
| } else { |
| theGPT->MakeProtectiveMBR(); |
| printf("Note: New protective MBR created.\n"); |
| } // if/else |
| } // if |
| break; |
| case 'h': case 'H': |
| theGPT->MakeHybrid(); |
| break; |
| case 'i': case 'I': |
| theGPT->ShowDetails(); |
| break; |
| case 'l': case 'L': |
| printf("Enter backup filename to load: "); |
| junk = fgets(line, 255, stdin); |
| sscanf(line, "%s", (char*) &buFile); |
| theGPT->LoadGPTBackup(buFile); |
| break; |
| case 'm': case 'M': |
| MainMenu(filename, theGPT); |
| goOn = 0; |
| break; |
| case 'o': case 'O': |
| theGPT->DisplayMBRData(); |
| break; |
| case 'p': case 'P': |
| theGPT->DisplayGPTData(); |
| break; |
| case 'q': case 'Q': |
| goOn = 0; |
| break; |
| case 't': case 'T': |
| theGPT->XFormDisklabel(); |
| break; |
| case 'v': case 'V': |
| theGPT->Verify(); |
| break; |
| case 'w': case 'W': |
| if (theGPT->SaveGPTData() == 1) { |
| goOn = 0; |
| } // if |
| break; |
| case 'x': case 'X': |
| ExpertsMenu(filename, theGPT); |
| goOn = 0; |
| break; |
| default: |
| ShowRecoveryCommands(); |
| break; |
| } // switch |
| } while (goOn); |
| } // RecoveryMenu() |
| |
| void ShowRecoveryCommands(void) { |
| printf("b\tuse backup GPT header (rebuilding main)\n"); |
| printf("c\tload backup partition table from disk (rebuilding main)\n"); |
| printf("d\tuse main GPT header (rebuilding backup)\n"); |
| printf("e\tload main partition table from disk (rebuilding backup)\n"); |
| printf("f\tload MBR and build fresh GPT from it\n"); |
| printf("g\tconvert GPT into MBR and exit\n"); |
| printf("h\tmake hybrid MBR\n"); |
| printf("i\tshow detailed information on a partition\n"); |
| printf("l\tload partition data from a backup file\n"); |
| printf("m\treturn to main menu\n"); |
| printf("o\tprint protective MBR data\n"); |
| printf("p\tprint the partition table\n"); |
| printf("q\tquit without saving changes\n"); |
| printf("t\ttransform BSD disklabel partition\n"); |
| printf("v\tverify disk\n"); |
| printf("w\twrite table to disk and exit\n"); |
| printf("x\textra functionality (experts only)\n"); |
| printf("?\tprint this menu\n"); |
| } // ShowRecoveryCommands() |
| |
| // Accept an experts' menu command. Returns only after the user |
| // selects an exit command, such as 'w' or 'q'. |
| void ExpertsMenu(char* filename, struct GPTData* theGPT) { |
| char command, line[255]; |
| char* junk; |
| PartTypes typeHelper; |
| uint32_t pn; |
| uint32_t temp1, temp2; |
| int goOn = 1; |
| |
| do { |
| printf("\nExpert command (? for help): "); |
| junk = fgets(line, 255, stdin); |
| sscanf(line, "%c", &command); |
| switch (command) { |
| case 'a': case 'A': |
| if (theGPT->GetPartRange(&temp1, &temp2) > 0) |
| theGPT->SetAttributes(theGPT->GetPartNum()); |
| else |
| printf("No partitions\n"); |
| break; |
| case 'c': case 'C': |
| if (theGPT->GetPartRange(&temp1, &temp2) > 0) { |
| pn = theGPT->GetPartNum(); |
| printf("Enter the partition's new unique GUID:\n"); |
| theGPT->SetPartitionGUID(pn, GetGUID()); |
| } else printf("No partitions\n"); |
| break; |
| case 'd': case 'D': |
| printf("The number of logical sectors per physical sector is %d.\n", |
| theGPT->GetAlignment()); |
| break; |
| case 'e': case 'E': |
| printf("Relocating backup data structures to the end of the disk\n"); |
| theGPT->MoveSecondHeaderToEnd(); |
| break; |
| case 'g': case 'G': |
| printf("Enter the disk's unique GUID:\n"); |
| theGPT->SetDiskGUID(GetGUID()); |
| break; |
| case 'i': case 'I': |
| theGPT->ShowDetails(); |
| break; |
| case 'l': case 'L': |
| temp1 = GetNumber(1, 128, 8, "Enter the number of logical sectors in a physical sector on the\ndisk (1-128, default = 8): "); |
| theGPT->SetAlignment(temp1); |
| break; |
| case 'm': case 'M': |
| MainMenu(filename, theGPT); |
| goOn = 0; |
| break; |
| case 'n': case 'N': |
| theGPT->MakeProtectiveMBR(); |
| break; |
| case 'o': case 'O': |
| theGPT->DisplayMBRData(); |
| break; |
| case 'p': case 'P': |
| theGPT->DisplayGPTData(); |
| break; |
| case 'q': case 'Q': |
| goOn = 0; |
| break; |
| case 'r': case 'R': |
| RecoveryMenu(filename, theGPT); |
| goOn = 0; |
| break; |
| case 's': case 'S': |
| theGPT->ResizePartitionTable(); |
| break; |
| case 'v': case 'V': |
| theGPT->Verify(); |
| break; |
| case 'w': case 'W': |
| if (theGPT->SaveGPTData() == 1) { |
| goOn = 0; |
| } // if |
| break; |
| case 'z': case 'Z': |
| if (theGPT->DestroyGPT() == 1) { |
| goOn = 0; |
| } |
| break; |
| default: |
| ShowExpertCommands(); |
| break; |
| } // switch |
| } while (goOn); |
| } // ExpertsMenu() |
| |
| void ShowExpertCommands(void) { |
| printf("a\tset attributes\n"); |
| printf("c\tchange partition GUID\n"); |
| printf("d\tdisplay the number of logical sectors per physical sector\n"); |
| printf("e\trelocate backup data structures to the end of the disk\n"); |
| printf("g\tchange disk GUID\n"); |
| printf("i\tshow detailed information on a partition\n"); |
| printf("b\tset the number of logical sectors per physical sector\n"); |
| printf("m\treturn to main menu\n"); |
| printf("n\tcreate a new protective MBR\n"); |
| printf("o\tprint protective MBR data\n"); |
| printf("p\tprint the partition table\n"); |
| printf("q\tquit without saving changes\n"); |
| printf("r\trecovery and transformation options (experts only)\n"); |
| printf("s\tresize partition table\n"); |
| printf("v\tverify disk\n"); |
| printf("w\twrite table to disk and exit\n"); |
| printf("z\tzap (destroy) GPT data structures and exit\n"); |
| printf("?\tprint this menu\n"); |
| } // ShowExpertCommands() |